2421005 has 4 divisors (see below), whose sum is σ = 2905212. Its totient is φ = 1936800.

The previous prime is 2420993. The next prime is 2421031. The reversal of 2421005 is 5001242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5001242 = 2 ⋅2500621.

It can be written as a sum of positive squares in 2 ways, for example, as 1408969 + 1012036 = 1187^2 + 1006^2 .

It is not a de Polignac number, because 2421005 - 2⁴ = 2420989 is a prime.

It is a super-2 number, since 2×2421005² = 11722530420050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242096 + ... + 242105.

It is an arithmetic number, because the mean of its divisors is an integer number (726303).

2^2421005 is an apocalyptic number.

It is an amenable number.

2421005 is a deficient number, since it is larger than the sum of its proper divisors (484207).

2421005 is an equidigital number, since it uses as much as digits as its factorization.

2421005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484206.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2421005 is about 1555.9579043149. The cubic root of 2421005 is about 134.2760515477.

Adding to 2421005 its reverse (5001242), we get a palindrome (7422247).

The spelling of 2421005 in words is "two million, four hundred twenty-one thousand, five".